Newport County, Rhode Island: drinking water report. Newport County on Rhode Island's southern coast has about 83,000 residents in communities including…
Newport County on Rhode Island's southern coast has about 83,000 residents in communities including Newport, Middletown, and Portsmouth. Aquidneck Island, which comprises most of the county's population, draws water from surface reservoirs and groundwater. Naval Station Newport – the Navy's primary officer training facility – occupies a significant portion of the island's northern end.
Naval Station Newport has confirmed PFAS contamination from AFFF use during fire training exercises. According to the Navy's 2024 environmental investigation, monitoring wells near the base show PFOS at 38 ppt. The contamination has migrated off-base, and Rhode Island DEM's 2024 investigation found PFAS in private wells in adjacent Middletown at concentrations up to 25 ppt.
Rhode Island has adopted a PFAS standard of 20 ppt for combined PFOS and PFOA. The Newport Water Division's reservoir supply has shown PFAS below this threshold in routine monitoring, but the proximity of the naval station to residential areas means groundwater users face more direct exposure. Saltwater intrusion also threatens island wells – chloride concentrations have been rising in production wells near the coast.
Newport County residents on private wells, particularly on Aquidneck Island near the naval station, should prioritize PFAS testing. The island's limited groundwater resources make every well's quality consequential.
Check your water for data at your address. For PFAS and coastal minerals, reverse osmosis handles both. Our water filter guide covers systems designed for coastal and military-adjacent scenarios. Pull your detailed report for local data, and visit our Rhode Island page for statewide patterns.
Drinking water is one exposure route. These federal datasets also cover Newport County, RI.
The EPA places Newport County, RI in Zone 2 - a moderate-risk category, with a predicted average indoor radon level between 2 and 4 pCi/L. Zone maps predict an area's radon potential from geology and existing indoor readings; they say nothing about a specific house. Testing is the only way to know your own level.
69% of homes in Newport County, RI were built before 1980, and 37% before 1950. Residential lead paint was banned in 1978, so housing age is the strongest available proxy for lead-paint exposure. This describes the county's housing stock, not any one home.
Modelled annual fine-particle pollution (PM2.5) in Newport County, RI averages 5 µg/m³, within the EPA's annual standard of 9 µg/m³. These are CDC modelled county estimates rather than readings from a specific monitor.
How radon zones work · Air quality by county · Lead exposure guide